222256690 has 8 divisors (see below), whose sum is σ = 400062060. Its totient is φ = 88902672.

The previous prime is 222256687. The next prime is 222256693. The reversal of 222256690 is 96652222.

It is an interprime number because it is at equal distance from previous prime (222256687) and next prime (222256693).

It can be written as a sum of positive squares in 2 ways, for example, as 220908769 + 1347921 = 14863^2 + 1161^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×222256690² = 98796072499512200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (222256693) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11112825 + ... + 11112844.

Almost surely, 2^222256690 is an apocalyptic number.

222256690 is a deficient number, since it is larger than the sum of its proper divisors (177805370).

222256690 is a wasteful number, since it uses less digits than its factorization.

222256690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22225676.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 222256690 is about 14908.2758895856. The cubic root of 222256690 is about 605.7381787128.

The spelling of 222256690 in words is "two hundred twenty-two million, two hundred fifty-six thousand, six hundred ninety".